⌖APEEL SUBEDIDWG NO. AS-2026 · REV 2.0
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LOG // ENGINEER'S LOG

Engineer's Log

Write-ups from the bench: what got built, what broke, and what the numbers actually said.

FILED UNDER: #arduino · #build-log · #controls · #deep-learning · #elm · #functional-programming · #games · #hardware · #machine-learning · #methodology · #numpy · #postmortem

MAY 26, 20262 MIN READ

Trust, but Verify: Checking Backprop to 1e-16

How I verified hand-derived gradients against PyTorch autograd to machine precision before training anything on CIFAR-10 — and why the overfit-a-tiny-subset trick catches what gradient checks miss.

  • #machine-learning
  • #numpy
  • #deep-learning
  • #methodology
APR 18, 20262 MIN READ

Levitation Is a Control Problem

Build log from the maglev platform: why magnetic levitation is fundamentally unstable, and how a Hall-effect sensor, a handful of op-amps, and an Arduino impersonating a PWM chip hold a platform in mid-air.

  • #hardware
  • #controls
  • #arduino
  • #build-log
SEP 02, 20252 MIN READ

Shipping a Game in a Language With No Exceptions

Postmortem of GhostBust Hotline: what it's like to lead a three-person team building a real-time shooter in Elm — a pure functional language — and why the compiler became our best teammate.

  • #games
  • #elm
  • #functional-programming
  • #postmortem

TITLE

PERSONAL PORTFOLIO — APEELS.COM.NP

DRAWN BY

APEEL SUBEDI

MATERIAL

NEXT.JS / TAILWIND / MARKDOWN

FINISH

BLUEPRINT, BRUSHED DARK

SCALE

1:1

REV

2.0

SHEET

1 OF 1

DATE

2026

TOLERANCE

±0.001

STATUS

APPROVED ✓

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